Specifications with standard typeface are for T

Range.V

Symbol

Parameter

Conditions

Typical

(Note 6)

Limit

(Note 5)

Units

T

SD_HYST

Thermal Shutdown

Hysteresis Temperature

25

˚C

Low-side Driver (LDR) Parameters

Specifications with standard typeface are for T

Range.V

Symbol

Parameter

Conditions

Typical

(Note 5)

Limit

(Note 6)

Units

V

OH

Logic High Level

V

6.8

6.6

V

V(min)

V

6

5.8

V

V(min)

V

OL

Logic Low Level

0

0.05

V

V(max)

I

SINK

LDR Sink Current

LDR Voltage = 1V

500

mA

I

SOURCE

LDR Source Current

LDR Voltage = 2V

180

mA

T

RR

Rise Time

C

18

ns

T

F

Fall Time

C

7

ns

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see

the Electrical Characteristics.

ambient temperature, and

allows the safe dissipation of more power. The Absolute Maximum power dissipation must be derated by 7.14 mW per ˚C above 25˚C ambient. The LM2655 actively

limits its junction temperatures to about 165˚C.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. The machine model is a 200pF capacitor discharged

directly into each pin.

Note 5: Typical numbers are at 25˚C and represent the most likely norm.

Note 6: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%

production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used

to calculate Average Outgoing Quality Level (AOQL).

Note 8: Measured while switching in closed loop with Vin = 15V.

Note 9: Average output current limit obtained using typical application circuit. This figure is dependant on the the inductor used.

Note 10: Bond wire resistance accounts for approximately 40m

www.national.com

6